all you need to do is:-
open tabbed browsng (assuming ur using explorer 7)
get ur photobucket images up by logging in
choose the picture you want to upload
click the box under the image marked direct link which will copy the url location of the image.
click the other tab which should still be your passionford reply.
click the box marked insert image (its not actually labelled insert image till you rest your mouse on it)
it pops up with a dialogue box asking for a web location.
delete the http bit then rightclick ur mouse choose paste and the image you wanted appears.
all youve done above is insert a link it works but not as well as image.
its that information that goes in the dialogue box
I struggled for a while but sussed it in the end...
check out my series one build
https://passionford.com/forum/restorations-rebuilds-and-projects/247462-series-one-rebuild.html